本研究探討將熱電發電器（TEG）與微膠囊相變材料（mPCM）整合於鋼筋混凝土屋頂之熱電性能表現。隨著建築節能需求增加，具備熱調節與能量收集功能的複合建築外殼之開發愈趨重要。然而，目前在屋頂應用mPCM熔點選擇缺乏系統性評估，且在不同熱流條件下之實驗驗證及相關設計指南尚未完善。

研究採用專門設計的實驗裝置，在太陽熱增益範圍為400至1000 W/m²的控制環境中，系統地評估了熔點為28°C、37°C和43°C的三種mPCM配置。評估指標包括發電能力、熱調節有效性、冷卻負荷減少、能量比率和瞬時熱穿透率。

研究結果表明，熔點選擇對熱管理和能量收集性能具有決定性影響。37°C mPCM配置在能量產生和熱調節方面表現卓越，在1000 W/m²熱流下達到114.58 mW/m²的峰值發電量——比28°C系統高31%，比43°C系統高5.6%。此外，37°C mPCM提供了83.78 kJ/m²的冷卻負荷減少，比28°C配置提高了30%。43°C mPCM在高溫下表現出較強的熱緩衝能力，但儲存能量釋放過快，無法維持持續發電效能。37°C mPCM在各種熱增益條件下提供平衡性能，而43°C變體則在極端高溫條件下表現卓越。

本研究成果增進了對建築外圍護結構中耦合熱-電過程的理論認識，且為TEG-mPCM系統在可持續建築中的應用提供具體設計依據，展現現代建築於節能及再生能源利用之潛力。

This study investigates the thermal and electrical performance of an integrated thermoelectric generator and microencapsulated phase change material (TEG-mPCM) system applied to reinforced concrete (RC) roof assemblies. To meet growing demands for energy-efficient building solutions, multifunctional building envelopes capable of both thermal regulation and energy harvesting are essential. This research addresses key gaps: systematic evaluation of mPCM melting point selection for roof applications, comprehensive experimental validation under varied heat flux conditions, and the lack of clear design guidelines.

Three mPCM configurations (28°C, 37°C, and 43°C melting points) were experimentally evaluated using a custom-designed setup under solar radiation ranging from 400 to 1000 W/m². Key metrics included power generation, thermal regulation, cooling load reduction, energy ratio, and instantaneous thermal penetration rate.

Results revealed significant influence of melting point selection on system performance. The 37°C mPCM configuration consistently demonstrated superior performance in energy generation and thermal regulation, achieving peak power generation of 114.58 mW/m² under 1000 W/m² heat flux—31% higher than the 28°C system and 5.6% higher than the 43°C system. Additionally, the 37°C mPCM delivered cooling load reduction of 83.78 kJ/m², representing a 30% improvement over the 28°C configuration. The 43°C mPCM exhibited enhanced thermal buffering capacity at high temperatures but released stored energy too rapidly to maintain sustained power generation.

The findings highlight the 37°C mPCM's optimal balance between thermal regulation and energy generation capabilities, providing critical insights and practical guidelines for sustainable and energy-efficient building designs.

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